Print

[MerrellRoofing]

What's the pitting from that I found in my pump flange? 

[mlappin]

If it was a diesel that didn't have coolant additive I'd say it looks like electrolysis. I've replaced a few sleeves in Wakausha's that had holes in them from it. Also seen a thermostat water neck at the JD dealer that had holes ate threw it from lack of proper coolant additives. Seems to be a diesel only problem. Compression is high enough in them that when it fires the sleeves expands slightly in a microsecond and forces the coolant away from it, then we the coolant rushes back in to the void it forms micro bubbles that act practically like mini sand blasters and will eventually erode the material all the way thru.

Not the same in a OWB of course, but it does look like it.

[farmboythegreat]

If it was a diesel that didn't have coolant additive I'd say it looks like electrolysis. I've replaced a few sleeves in Wakausha's that had holes in them from it. Also seen a thermostat water neck at the JD dealer that had holes ate threw it from lack of proper coolant additives. Seems to be a diesel only problem. Compression is high enough in them that when it fires the sleeves expands slightly in a microsecond and forces the coolant away from it, then we the coolant rushes back in to the void it forms micro bubbles that act practically like mini sand blasters and will eventually erode the material all the way thru.

Not the same in a OWB of course, but it does look like it.

3000 4000 5000  fords are  bad  for  that

[mlappin]

So are Cat 3208's. Just found it easier to go with a high grade antifreeze that has the DCA additives already in it instead of buying the test strips and checking every engine every year than buying the additive and adding when needed. The 3208's are even dry sleeved but the electrolysis effects other parts of the cooling system.